Question

A body moves with a uniform acceleration of 3 m/s2. After 10 seconds, its velocity becomes
50 m/s. Find the initial velocity of the body.​

Answer 1

Answer:

Acceleration =3m/s(square)

time=10second

Final velocity =50m/s

initial velocity =?

(By IST equation )

v=u+at

50=u+3(10)

50-30=u

20=u

Answer =20m/s

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Answer 2

Answer:

20 m/s is the initial velocity of the given body .

Explanation:

Acceleration of  the body  = 3 $m$/$sec^{2}$

time = 10 sec and velocity = 50 m /sec .

From the first equation of motion we have ,

v = u + at

Where , v is final velocity , u is initial velocity ,a is acceleration

and t is time .

Therefore  ,from the question  we have

v = 50m/s , t = 10 s and a = 3m/$s^{2}$

Now , put the all given values in the equation of motion we get ,

v = u + at

⇒50 = u + 3 × 10

⇒u = 50 - 30 = 20 m/s

Hence , the initial velocity of the body is 20m/s .

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